Pros: Snow and more snow! Huge. Steep. No crowds.
Cons: You might get lost.
In the winter of 2009, I took a trip to Jackson Hole with a few friends hoping to for a good time and some great snow. What I found was a mountain that delivered everything I was looking for and more.
First of all, the skiing is unparalleled. There is no resort in the states that seems to cover the same amount of terrain, in style, function, size or any other metric you put down. The snow is light and fluffy and tends to come often. It snowed 3 of 5 skiing days/nights for a total of 32" while I was there. The mountain has the most challenging steep terrain that I've ever skied especially because of the way the mountain combines natural obstacles (rocks, chutes, etc) and in-bounds skiing. While the terrain beyond the gates is unbelievable, it isn't for everyone. With that said, if you like the quiet of just yourself, a group of friends and the great outdoors, its hard to compare with anywhere else I've been. Even you stick to the patrolled areas, you can find yourself nearly a mile from any other ticketed skier (say in the Hobacks!). In comparison with resorts in CO or NoCal, Jackson Hole is miles above and beyond. With respect to Utah, its less frequented and so there is more room to ski and fewer crowds with whom you have to share the lifts!
While the town of Jackson is a quiet place with less going on than Aspen, its got a few great bars and restaurants. Also, the locals are about as friendly as it gets - they actually live here year round and aren't just visiting a massive villa with the hope of staying out at bars all night long and skiing for 3 hours the next afternoon. This is a ski town and that's what makes it great. In any case, my hope is that you haven't shown up in Wyoming looking for bunnies (thought you may find a few ski bums).
All in all, if you take skiing seriously, you will enjoy Jackson Hole. No ifs, ands or buts about it!